Builder infrastructure

Composio

Everything your agents need to take action

Composio is agent integration infrastructure: SDKs, tool execution, delegated authentication, a sandbox and a managed MCP layer for connecting agents to third-party software. Its platform API exposes toolkits, tools, connected accounts, triggers, webhooks and MCP-server management.

From official docs

What Composio is

From official docs

Composio is a developer platform for giving an AI agent authenticated access to third-party software without implementing each integration separately. The retrieved docs describe two primary modes: native tools supplied to an agent through the SDK, or an MCP session URL and headers supplied to an MCP-compatible client.

What it can do

Vendor's own claim

Agent access to 1,000+ advertised integrations and toolkits
Just-in-time tool search and tool execution
Delegated end-user authentication and connected-account management
Native SDK integration for agent frameworks
Session-specific MCP access for compatible clients
Triggers, webhooks, logs and sandboxed execution environments
Team governance, audit controls and enterprise deployment options

Who it is for

From official docs

Teams building agents that must take action across SaaS tools and need an abstraction for tool discovery, user authentication, execution, triggers and auditability instead of maintaining each connector independently.

When to choose something else

Our read

Composio is infrastructure for building or operating agents, not an end-user GTM app. A team that only needs one fixed integration, or cannot own the authentication, permissions and rate-limit consequences of an agent acting in connected accounts, is likely better served by a narrower direct integration or a conventional automation tool.

Implementation considerations

Our read

Setup assessment: 1h

The vendor advertises a no-card free start and documents both SDK and MCP session flows. A working agent integration requires creating a project/API key, choosing toolkits, establishing user-specific auth and testing the agent's permitted actions.

Prerequisites

Composio account and project API key
An agent or MCP-compatible client
A user-identity and third-party authentication model
Chosen toolkits and permission scopes

Developer and agent access

From official docs

Authentication: Project API key in x-api-key, user API key in x-user-api-key, or organization API key in x-org-api-key.
Base URL: https://backend.composio.dev
Machine-readable API: OpenAPI specification linked

Authentication configuration management
Connected-account management
Toolkit and tool management
Tool execution
Trigger management and execution
Webhook configuration and subscriptions
MCP server management
Logs and monitoring

Published pricing

From official docs

Plan	Price	Included
Totally Free	$0/month	20K tool calls/month
Ridiculously Cheap	$29/month	200K tool calls/month; $0.299/1K additional calls
Serious Business	$229/month	2M tool calls/month; $0.249/1K additional calls
For Enterprise	Contact for custom quote	See official pricing

Verify before you adopt it

Current post-August-15 pricing and per-tool rate-limit documentation